Iron-rich aluminosilicates with disordered structure (laterites) due to the corrosion of kaolinite by iron minerals were investigated as solid precursors for geopolymerization. The particle size distribution, B.E.T surface area, thermal activation, and chemical and mineralogical compositions were used to evaluate the reactivity of iron-rich laterites (35 wt.% of Fe2O3-FeO). The raw materials in the temperature range between 25 and 500 °C showed geopolymerization behaviour similar to that of metakaolin. At temperatures higher than 500 °C, the coarsening of particles and the decrease of B.E.T surface area correspond to an initial sintering of laterites explaining the poor polycondensation/geopolymerization and the decrease of strength of the final products. The increase of the temperature of calcination of raw laterites between 25 and 500 °C corresponds to a reduction of the setting time of geopolymer products. However, this variation of temperature did not significantly affect the flexural strength that remained between ~ 4 and ~ 6 MPa, confirming the possibility to produce sustainable matrices, with more energy saving, using highly corroded laterites.
The corrosion of kaolinite by iron minerals and the effects on geopolymerization / Kaze, R. C; Beleuk à. Moungam, L. M.; Fonkwe Djouka, M. L.; Nana, A.; Kamseu, Elie; Chinje Melo, U. F.; Leonelli, Cristina. - In: APPLIED CLAY SCIENCE. - ISSN 0169-1317. - 138(2017), pp. 48-62.
Data di pubblicazione: | 2017 |
Data di prima pubblicazione: | 6-gen-2017 |
Titolo: | The corrosion of kaolinite by iron minerals and the effects on geopolymerization |
Autore/i: | Kaze, R. C; Beleuk à. Moungam, L. M.; Fonkwe Djouka, M. L.; Nana, A.; Kamseu, Elie; Chinje Melo, U. F.; Leonelli, Cristina |
Autore/i UNIMORE: | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.clay.2016.12.040 |
Rivista: | |
Volume: | 138 |
Pagina iniziale: | 48 |
Pagina finale: | 62 |
Codice identificativo ISI: | WOS:000393936100007 |
Codice identificativo Scopus: | 2-s2.0-85008397850 |
Citazione: | The corrosion of kaolinite by iron minerals and the effects on geopolymerization / Kaze, R. C; Beleuk à. Moungam, L. M.; Fonkwe Djouka, M. L.; Nana, A.; Kamseu, Elie; Chinje Melo, U. F.; Leonelli, Cristina. - In: APPLIED CLAY SCIENCE. - ISSN 0169-1317. - 138(2017), pp. 48-62. |
Tipologia | Articolo su rivista |
File in questo prodotto:
File | Descrizione | Tipologia | |
---|---|---|---|
Applied Clay Science 138 2017 48–62 kaze et al .2017.pdf | Articolo pubblicato | Versione dell'editore (versione pubblicata) | Administrator Richiedi una copia |

I documenti presenti in Iris Unimore sono rilasciati con licenza Creative Commons Attribuzione - Non commerciale - Non opere derivate 3.0 Italia, salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris